Top investor: Buy this beaten-up railroad stock

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Stephanie Link, managing director at TIAA, acquired shares of a beaten-down railroad company, predicting a rally in the stock ahead.

On Monday, the investor scooped shares of Union Pacific for the fund she manages in real life as well as CNBC Pro's model portfolio.

After a difficult period for railroad stocks, which sent shares of Union Pacific lower by more than 30 percent in the past 12 months, Link believes now it's the time to get in.

Here are the reasons why she's bullish on the stock: